"It is obviously true forests soak up C02 which is one of the major reasons for protecting forests. Unfortunately, we're losing them at a fast rate but the reasons why forests grow in the way they do is partially because they take C02 out of the atmosphere but also because of predictable weather, rainfall, soil - climate change will disrupt those things.

"To think that merely having more C02 in the atmosphere will lead to better forests growth is a misunderstanding of science. It doesn't happen."